This reference is for Processing 3.0+. If you have a previous version, use the reference included with your software in the Help menu. If you see any errors or have suggestions, please let us know. If you prefer a more technical reference, visit the Processing Core Javadoc and Libraries Javadoc.





example pic
PImage tower;

void setup() {
  size(100, 100);
  tower = loadImage("tower.jpg");
  color black = color(0);
  tower.set(30, 20, black); 
  tower.set(85, 20, black); 
  tower.set(85, 75, black); 
  tower.set(30, 75, black); 

void draw() {
  image(tower, 0, 0);
Description Changes the color of any pixel or writes an image directly into the display window.

The x and y parameters specify the pixel to change and the color parameter specifies the color value. The color parameter is affected by the current color mode (the default is RGB values from 0 to 255). When setting an image, the x and y parameters define the coordinates for the upper-left corner of the image, regardless of the current imageMode().

Setting the color of a single pixel with set(x, y) is easy, but not as fast as putting the data directly into pixels[]. The equivalent statement to set(x, y, #000000) using pixels[] is pixels[y*width+x] = #000000. See the reference for pixels[] for more information.
pimg.set(x, y, c)
pimg.set(x, y, img)
pimg PImage: any object of type PImage
x int: x-coordinate of the pixel
y int: y-coordinate of the pixel
c int: any value of the color datatype
img PImage: image to copy into the original image
Updated on January 1, 2021 03:38:09am EST